/**
* Return true if all partitions assigned to that host for domains of the given domain group
* version are at the correct version. And there are no deletable partitions.
*
* @param host
* @param domainGroupVersion
* @return
* @throws IOException
*/
public static boolean isUpToDate(Host host, DomainGroupVersion domainGroupVersion)
throws IOException {
if (domainGroupVersion == null || domainGroupVersion.getDomainVersions() == null) {
return false;
}
// Check that each domain of the given domain group version is up to date on this host
for (DomainGroupVersionDomainVersion dgvdv : domainGroupVersion.getDomainVersions()) {
Domain domain = dgvdv.getDomain();
HostDomain hostDomain = host.getHostDomain(domain);
if (hostDomain != null) {
for (HostDomainPartition partition : hostDomain.getPartitions()) {
// Ignore deletable partitions
if (!partition.isDeletable()) {
// If the partition is not currently at the given domain group version, the host is not
// up-to-date
if (partition.getCurrentDomainGroupVersion() == null
|| partition.getCurrentDomainGroupVersion()
!= domainGroupVersion.getVersionNumber()) {
return false;
}
}
}
}
}
// Check if there is any deletable partition
for (HostDomain hostDomain : host.getAssignedDomains()) {
for (HostDomainPartition partition : hostDomain.getPartitions()) {
if (partition.isDeletable()) {
return false;
}
}
}
return true;
}
public static ServingStatusAggregator computeServingStatusAggregator(
Host host, DomainGroupVersion domainGroupVersion) throws IOException {
ServingStatusAggregator result = new ServingStatusAggregator();
for (HostDomain hostDomain : host.getAssignedDomains()) {
for (HostDomainPartition partition : hostDomain.getPartitions()) {
// Ignore deletable partitions
if (!partition.isDeletable()) {
// Check if partition is served and up to date
boolean servedAndUpToDate =
host.getState() == HostState.SERVING
&& partition.getCurrentDomainGroupVersion() != null
&& partition
.getCurrentDomainGroupVersion()
.equals(domainGroupVersion.getVersionNumber());
// Aggregate counts
result.add(hostDomain.getDomain(), partition.getPartitionNumber(), servedAndUpToDate);
}
}
}
return result;
}
public static UpdateProgress computeUpdateProgress(
Host host, DomainGroupVersion domainGroupVersion) throws IOException {
int numPartitions = 0;
int numPartitionsUpToDate = 0;
for (DomainGroupVersionDomainVersion dgvdv : domainGroupVersion.getDomainVersions()) {
Domain domain = dgvdv.getDomain();
HostDomain hostDomain = host.getHostDomain(domain);
if (hostDomain != null) {
for (HostDomainPartition partition : hostDomain.getPartitions()) {
// Ignore deletable partitions
if (!partition.isDeletable()) {
++numPartitions;
if (partition.getCurrentDomainGroupVersion() != null
&& partition
.getCurrentDomainGroupVersion()
.equals(domainGroupVersion.getVersionNumber())) {
++numPartitionsUpToDate;
}
}
}
}
}
return new UpdateProgress(numPartitions, numPartitionsUpToDate);
}
/**
* Returns true when the host is online. Note that this is distinct from "serving data" - a host
* is online when it's NOT offline.
*
* @param host
* @return
* @throws IOException
*/
public static boolean isOnline(Host host) throws IOException {
return host.getState() != HostState.OFFLINE;
}
public static void enqueueCommandIfNotPresent(Host host, HostCommand command) throws IOException {
if (host.getCurrentCommand() != command && !host.getCommandQueue().contains(command)) {
host.enqueueCommand(command);
}
}